Honda 919 slip ons : options? suggestions? - Wrist Twisters
 
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post #1 of 14 Old 09-22-2006, 09:38 PM
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Honda 919 slip ons : options? suggestions?

Does anyone know if there is a brand of slip ons for the 919 that does not require remapping the fuel injection? Just to lose some weight would be cool. Thanks.

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post #2 of 14 Old 09-22-2006, 11:09 PM
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non of the available slip-on "require" a map...it is possible to run them all w/ the stock ECU

the stock cans are heavy, no doubt about it but don't switch for the weight savings alone, not worth it...buy the slipons cause u like the sound/looks if anything...least that's my 2c

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post #3 of 14 Old 09-22-2006, 11:22 PM
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Thanks for the reply. My main concern is a lean mixture. Stock is lean enough and I have read a few posts on increased temp. Thoughts?

post #4 of 14 Old 09-23-2006, 10:33 AM
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From Kyle Race Engines:
"Current Honda ECU's automatically get richer as the engine temp increases, the air/fuel ratio is changing constantly at a non linear rate. "
I don't know how it will apply to the 919,but just a thought.
Generaly FI will adjust for the increased flow of exhaust in air/fuel to keep the mixture ratio right in accordence to factory settings,question is how much of a range perameter did honda give it?
If it goes out of range you get a check engine light.
Remapping just gets out all the motor has to offer in the most efficent way, More Power= More Fun!

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post #5 of 14 Old 09-23-2006, 10:56 AM
 
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I've been told that the 919 already runs a little rich from the factory.

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post #6 of 14 Old 09-23-2006, 11:15 AM
 
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runs way rich from the factory

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post #7 of 14 Old 09-23-2006, 12:45 PM
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Because a bike is fuel injected doesn't mean it will adjust for increased airflow. It has to have an exhaust sensor or a mass airflow sensor to know it has more airflow. I don't think the 9er has either. 2D mapping vs. 3D mapping. It may "compensate" based on engine temp or something, but it doesn't know the inlet airflow quantity/exiting mixture.

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post #8 of 14 Old 09-23-2006, 01:29 PM
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ok, here's a question...has stock motorcycle ever, ever been trashed buy a slipon mod by itself (due extended running of a leaned condition for example)

has anyone ever heard of this happening?

just curious

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post #9 of 14 Old 09-23-2006, 01:31 PM
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The staintune exhaust do not require a remap, From there site "Re-jetting or chipping is not needed with STAINTUNE exhaust". I think thats what your looking for. They sound and look great also.

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post #10 of 14 Old 09-23-2006, 02:34 PM
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The Staintune mufflers also have steel wool so they never require a repack. The finnish is the best, but they are also the most expensive. They are good if you don't want lots of noise. They also come with a quiet insert.

Sato's are the most popular by far because of their good quality and titanium construction. They are middle of the road on price.

The Erion Racing mufflers are cheaper still and use a ceramic coated fiber so they keep their packing in longer. They come in black painted stainless.

The only mufflers you shouldn't buy are Two Brothers. Everyone I know that has them have "can cancer". They will look like crap after one season.

www.starcycle.com Take your pick.

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post #11 of 14 Old 09-23-2006, 04:05 PM
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Quote:
Originally Posted by ratdog View Post
ok, here's a question...has stock motorcycle ever, ever been trashed buy a slipon mod by itself (due extended running of a leaned condition for example)

has anyone ever heard of this happening?

just curious
I would seriously doubt it. Would it run leaner, especially with an air filter mod also, probably. Enough to trash it? Nah. Not if it's a Honda.

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post #12 of 14 Old 09-25-2006, 08:47 AM
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Quote:
Originally Posted by HondaJim View Post
I would seriously doubt it. Would it run leaner, especially with an air filter mod also, probably. Enough to trash it? Nah. Not if it's a Honda.
I doubt Hondas would have a problem, but I did hear of a guy on the KZrider forum who toasted a piston because his MAC exhaust leaned his mix out too much. Of course, we're talking 80's tech vs. current tech, so take that with a grain of salt...

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post #13 of 14 Old 09-25-2006, 08:59 AM
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If I'm not mistaken, the KZ's are also two strokes which brings in a lot of other variables.

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post #14 of 14 Old 09-25-2006, 09:17 AM
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Originally Posted by Super Sneaky Steve View Post
If I'm not mistaken, the KZ's are also two strokes which brings in a lot of other variables.
I wish! My little 440 is a 4 stroke.

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